This applies to all desktop environments.
The concept of ArcoLinux is that anyone can use it. Your level of linux can be beginner, intermediate or expert. There will be something in it for everyone.
In this video we will show you how easy it is to install software on ArcoLinux with gnome-software.
As of May 2018 you need these two packages to have a working gnome-software.
sudo pacman -S gnome-software
sudo pacman -S gnome-software-packagekit-plugin